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PROPERTY, PLANT AND EQUIPMENT, NET - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Property, Plant and Equipment [Line Items]
Depreciation	$ 34,291	$ 31,409	$ 28,922
Gain on sale of manufacturing facility	4,900	0	0
Building improvements
Property, Plant and Equipment [Line Items]
Impairment charge	1,333
Manufacturing facility \| New Jersey
Property, Plant and Equipment [Line Items]
Impairment charge	5,502
Gain on sale of manufacturing facility	4,900
Manufacturing facility \| United Kingdom
Property, Plant and Equipment [Line Items]
Impairment charge	244		6,166
Manufacturing facility \| United Kingdom \| Disposal Group, Held-for-sale, Not Discontinued Operations
Property, Plant and Equipment [Line Items]
Property, plant and equipment classified as held for sale	$ 1,874
Machinery and equipment \| United States and United Kingdom
Property, Plant and Equipment [Line Items]
Impairment charge		$ 12,313	$ 9,653